Convert ISO 8601 to unixtimestamp

Question

How can I convert 2012-01-18T11:45:00+01:00 (ISO 8601) to 1326883500 (unixtimestamp) in PHP?

score 67 · Accepted Answer · edited Jul 20 '23 at 13:49

67

This code converts an ISO 8601 datetime to a Unix timestamp in UTC.

echo date("U",strtotime('2012-01-18T11:45:00+01:00'));

longer version:

$dateTime = new DateTime('2012-01-18T11:45:00+01:00');
$dateTime->setTimezone(new DateTimeZone('UTC'));
$utcTimestamp = $dateTime->getTimestamp();
echo $utcTimestamp;

edited Jul 20 '23 at 13:49

Sabrina

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answered Jan 18 '12 at 10:50

k102

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Thanks, didnt know strtotime knew about ISO dates – 472084 Jan 18 '12 at 10:57
@Codler in this case no. i thought you may want to use another format of input/output – k102 Jan 18 '12 at 11:16

John Slegers · Answer 2 · 2016-02-20T16:37:43.097

To convert from ISO 8601 to unixtimestamp :

strtotime('2012-01-18T11:45:00+01:00');
// Output : 1326883500

To convert from unixtimestamp to ISO 8601 (timezone server) :

date_format(date_timestamp_set(new DateTime(), 1326883500), 'c');
// Output : 2012-01-18T11:45:00+01:00

To convert from unixtimestamp to ISO 8601 (GMT) :

date_format(date_create('@'. 1326883500), 'c') . "\n";
// Output : 2012-01-18T10:45:00+00:00

To convert from unixtimestamp to ISO 8601 (custom timezone) :

date_format(date_timestamp_set(new DateTime(), 1326883500)->setTimezone(new DateTimeZone('America/New_York')), 'c');
// Output : 2012-01-18T05:45:00-05:00

Very useful! Thanks much! – 夏期劇場 Aug 29 '17 at 07:54 — 夏期劇場, Aug 29 '17 at 07:54

Convert ISO 8601 to unixtimestamp

2 Answers2

To convert from ISO 8601 to unixtimestamp :

To convert from unixtimestamp to ISO 8601 (timezone server) :

To convert from unixtimestamp to ISO 8601 (GMT) :

To convert from unixtimestamp to ISO 8601 (custom timezone) :

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